Michele Roberts has heard the complaints about the N.B.A.’s best team, the Golden State Warriors, signing an All-Star. She has heard the whining about the league’s best player, LeBron James, moving westward in the first week of free agency. She has seen fans and pundits proclaim the league isn’t competitive enough, and has watched the blame for that land on the doorstep of the National Basketball Players Association and its decision three years ago to reject a league proposal to prevent the limit on player salaries from rising faster than ever before.

After keeping quiet for a week, Roberts, executive director of the players’ union, fired back over the weekend. In a series of emails, she rejected the idea of blaming the players’ decision on the issue known as cap smoothing as nonsense. General managers and coaches may want to blame the players for their teams not being good enough to contend for a championship, she said, but they have no one to blame but themselves.

“Frankly, I have been amused by the chatter suggesting that smoothing — or more accurately the failure to smooth — has now become some folks’ boogeyman de jure,” Roberts said in an email. “While we haven’t yet blamed it for the assassination of MLK, some are now suggesting that it is responsible for all that is presumably wrong with today’s NBA.” …